With a dumbbell in each hand, sit down on an incline bench set at a 45-degree angle. Position the weights close to the chest as you sit down. With feet flat on the floor, hold two dumbbells on your lap. Be sure that your back is flat on the bench and raise the dumbbells above your chest and straighten the arms until there is a slight bend in your elbows. Palms should be facing one another. As you inhale, lower the dumbbells to the outside of the body in a semi-circular motion. When your elbows are even with the bench, bring the weights back up over your chest following the same pattern as you exhale. Be sure to utilize the chest muscles, instead of using the biceps to stabilize the weights during the exercise. Always keep a slight bend in the elbows.